Avalon VT-737SP - Service, Warranty, and Support

Glossary
Page 53Avalon Vt-737sp Operation Manual
overload - The distortion that occurs when an
applied signal exceeds a system’s maximum
input level.
parametric EQ - A parametric EQ allows contin-
uous control of each of the three primary EQ
parameters (frequency, gain and bandwidth)
independently.
peak amplitude - The maximum instantaneous
amplitude of a signal.
phantom power - Power for a condenser mic
from a preamplifier supplying a positive DC
supply voltage of +48V through a balanced XLR
mic cable.
phase - The degree of progression in the cycle of
a wave, where one complete cycle is 360
degrees. Phase is measured in degrees of a
cycle (divided into 360 degrees) and will result in
audible variations of a combined signal’s ampli-
tude and overall frequency response.
phase shift - The difference in degrees of phase
angle between corresponding points on two
waves.
potentiometer (pot) - A rotary gain, pan, or
other type of continuously variable signal control.
preamplifier - A piece of equipment that boosts
the signal level so that the signal operates at a
higher and more desired level enabling greater
frequency and dynamic range.
release time - Once compression has begun,
the time taken for the attenuated signal to return
to 63% of its original (uncompressed) level.
resistance - The opposition to the flow of DC
current in a wire or circuit.
ribbon microphone - A microphone that uses
a diaphragm of extremely thin, aluminium
ribbon suspended in a strong field of magnetic
flux. As sound-pressure variations displace the
metal diaphragm in accordance with air-particle
velocity, the ribbon cuts across the magnetic
lines of flux. This induces a current in the ribbon
of proportional amplitude and frequency to the
acoustic waveform.
shelving filter - A rise or drop in frequency
response at a selected frequency that tapers off
to a preset level and continues at the level to
the end of the audio spectrum.
side chain - A function on a compressor where
a specified frequency range is compressed
more than the overall compression of a musical
program. Many compressors have a jack so
that an equalizer can be inserted into the com-
pressor so that whatever frequency bands are
boosted on the equalizer, the compressor com-
presses the boosted bands more than the over-
all compression.
spectral control - The use of a side chain in a
compressor to compress selected frequencies
of a musical program. One example of spectral
control is removing the “sss” sound of a vocal
(de-essing).
sweet EQ - An equalizer that allows you to
“sweep” or continuously vary the frequency of
one or more sections.